Etymology and distribution of 昼澤.

Hirusawa 【昼澤】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hiroshima-ken , Hyougo-ken , Kagoshima-ken .

① 安本 surname. There is the era of 1156 years to 1159 years (Yuan (Hougen) year).

※ There was a tradition that Saga-ken Saga-shi renamed from Yasumoto surname. Unknown times.

② Creation . "Yuan" is added to the guardian who is the surname of Amagi archipelago of Kagoshima-ken . Estimated at the time of returning to Japan in 1953. Kagoshima-ken Ooshima-gun The origin of Kikai-chou . 保 Tamotsu reference.